VENTURIS 486 (VER. 1.0) Motherboard Settings and Configuration

DIGITAL EQUIPMENT CORPORATION

VENTURIS 486 (VER. 1.0)

Device Type
Mainboard
Processor
AM486DXL/AM486DXL2/P24D/P24T
Processor Speed
40/50(internal)/66(internal)/100(internal)MHz
Chip Set
Unidentified
Video Chip Set
S3
Maximum Onboard Memory
68MB
Maximum Video Memory
1MB
Cache
None
BIOS
Phoenix
Dimensions
254mm x 218mm
I/O Options
Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Chassis fan power
C1
Parallel port
CN4
Speaker
C2
PS/2 mouse port
CN5
LED connector
C3
Floppy drive interface
CN6
VGA port
CN1
IDE interface
CN7
Serial port
CN2
IDE interface
CN8
Serial port
CN3
Riser slot
SL1
Note: VGA & serial ports are shown for location purposes only. The location may not be exact.

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
Factory configured - do not alter
J3
Open
»
Snoop select enabled
J18
Pins 1 & 2 closed

Snoop select disabled
J18
Pins 2 & 3 closed
»
On board video enabled
J19
Pins 2 & 3 closed
On board video disabled
J19
Pins 1 & 2 closed
»
Recovery mode normal operation
J21
Open

Recovery mode enabled
J21
Closed
»
Password normal operation
J23
Open

Password clear
J23
Closed
»
Factory configured - do not alter
SL2
Unidentified

SIMM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
4MB
4MB
None
None
8MB
4MB
(1) 1M x 36
None
12MB
4MB
(1) 1M x 36
(1) 1M x 36
12MB
4MB
(1) 2M x 36
None
16MB
4MB
(1) 1M x 36
(1) 2M x 36
20MB
4MB
(1) 2M x 36
(1) 2M x 36
20MB
4MB
(1) 4M x 36
None
24MB
4MB
(1) 1M x 36
(1) 4M x 36
28MB
4MB
(1) 2M x 36
(1) 4M x 36
36MB
4MB
(1) 4M x 36
(1) 4M x 36
36MB
4MB
(1) 8M x 36
None

SIMM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
40MB
4MB
(1) 1M x 36
(1) 8M x 36
44MB
4MB
(1) 2M x 36
(1) 8M x 36
52MB
4MB
(1) 4M x 36
(1) 8M x 36
68MB
4MB
(1) 8M x 36
(1) 8M x 36
Note: Bank 0 is factory installed and is not configurable. The location is unidentified.

VIDEO MEMORY CONFIGURATION
Note: Board is factory installed with 1MB cache. The location is unidentified.

CPU SPEED SELECTION
Speed
J14
J15
40MHz
Closed
Open
50iMHz
Open
Open
66iMHz
Open
Closed
100iMHz
Open
Closed

CPU TYPE SELECTION
Speed
J1
J2
J4
J9
J10
AM486DXL
Closed
Closed
2 & 3
1 & 2
2 & 3
AM486DXL2
Closed
Closed
2 & 3
1 & 2
2 & 3
P24D
Open
Open
1 & 2
1 & 2
1 & 2
P24T
Open
Open
1 & 2
1 & 2
1 & 2
Note: Pins designated should be in the closed position.

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VENTURIS 486 (VER. 1.0) Motherboard Settings and Configuration

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Device Type	Mainboard
Processor	AM486DXL/AM486DXL2/P24D/P24T
Processor Speed	40/50(internal)/66(internal)/100(internal)MHz
Chip Set	Unidentified
Video Chip Set	S3
Maximum Onboard Memory	68MB
Maximum Video Memory	1MB
Cache	None
BIOS	Phoenix
Dimensions	254mm x 218mm
I/O Options	Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Chassis fan power	C1	Parallel port	CN4
Speaker	C2	PS/2 mouse port	CN5
LED connector	C3	Floppy drive interface	CN6
VGA port	CN1	IDE interface	CN7
Serial port	CN2	IDE interface	CN8
Serial port	CN3	Riser slot	SL1
Note: VGA & serial ports are shown for location purposes only. The location may not be exact.

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	J3	Open
»	Snoop select enabled	J18	Pins 1 & 2 closed
	Snoop select disabled	J18	Pins 2 & 3 closed
»	On board video enabled	J19	Pins 2 & 3 closed
	On board video disabled	J19	Pins 1 & 2 closed
»	Recovery mode normal operation	J21	Open
	Recovery mode enabled	J21	Closed
»	Password normal operation	J23	Open
	Password clear	J23	Closed
»	Factory configured - do not alter	SL2	Unidentified

SIMM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
4MB	4MB	None	None
8MB	4MB	(1) 1M x 36	None
12MB	4MB	(1) 1M x 36	(1) 1M x 36
12MB	4MB	(1) 2M x 36	None
16MB	4MB	(1) 1M x 36	(1) 2M x 36
20MB	4MB	(1) 2M x 36	(1) 2M x 36
20MB	4MB	(1) 4M x 36	None
24MB	4MB	(1) 1M x 36	(1) 4M x 36
28MB	4MB	(1) 2M x 36	(1) 4M x 36
36MB	4MB	(1) 4M x 36	(1) 4M x 36
36MB	4MB	(1) 8M x 36	None

SIMM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2
40MB	4MB	(1) 1M x 36	(1) 8M x 36
44MB	4MB	(1) 2M x 36	(1) 8M x 36
52MB	4MB	(1) 4M x 36	(1) 8M x 36
68MB	4MB	(1) 8M x 36	(1) 8M x 36
Note: Bank 0 is factory installed and is not configurable. The location is unidentified.

CPU SPEED SELECTION
Speed	J14	J15
40MHz	Closed	Open
50iMHz	Open	Open
66iMHz	Open	Closed
100iMHz	Open	Closed

CPU TYPE SELECTION
Speed	J1	J2	J4	J9	J10
AM486DXL	Closed	Closed	2 & 3	1 & 2	2 & 3
AM486DXL2	Closed	Closed	2 & 3	1 & 2	2 & 3
P24D	Open	Open	1 & 2	1 & 2	1 & 2
P24T	Open	Open	1 & 2	1 & 2	1 & 2
Note: Pins designated should be in the closed position.